NKTX · Insider Trading
Nkarta, Inc. Common Stock
Every open-market purchase and sale reported by NKTX officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-22 | Paul J Hastings | Chief Executive Officer | Sell | −1,776 | −$4.81K |
| 2026-06-11 | George Vratsanos | Director | A | +37,000 deriv. | — |
| 2026-06-11 | Leone D Patterson | Director | A | +37,000 deriv. | — |
| 2026-06-11 | Michael Dybbs | Director | A | +37,000 deriv. | — |
| 2026-06-11 | Zachary Scheiner | Director | A | +37,000 deriv. | — |
| 2026-06-11 | Ali Behbahani | Director | A | +37,000 deriv. | — |
| 2026-06-11 | Simeon George | Director | A | +37,000 deriv. | — |
| 2026-06-11 | RA CAPITAL MANAGEMENT, L.P. | Director | A | +185,000 deriv. | — |
| 2026-06-11 | Angela Thedinga | Director | A | +37,000 deriv. | — |
| 2026-01-20 | Nadir Mahmood | President | Sell | −5,649 | −$11.69K |
| 2026-01-20 | Paul J Hastings | Chief Executive Officer | Sell | −26,046 | −$53.92K |
| 2026-01-08 | Shawn Marshall Rose | See Remarks | A | +70,000 | — |
| 2026-01-08 | Nadir Mahmood | President | A | +80,000 | — |
| 2026-01-08 | Paul J Hastings | Chief Executive Officer | A | +94,000 | — |
| 2025-06-25 | Shawn Marshall Rose | See Remarks | A | +500,000 deriv. | — |
| 2025-06-20 | Paul J Hastings | Chief Executive Officer | Sell | −1,790 | −$3.20K |
| 2025-06-09 | George Vratsanos | Director | A | +46,000 deriv. | — |
| 2025-06-09 | Simeon George | Director | A | +46,000 deriv. | — |
| 2025-06-09 | Ali Behbahani | Director | A | +46,000 deriv. | — |
| 2025-06-09 | Zachary Scheiner | Director | A | +46,000 deriv. | — |
| 2025-06-09 | Leone D Patterson | Director | A | +46,000 deriv. | — |
| 2025-06-09 | Angela Thedinga | Director | A | +46,000 deriv. | — |
| 2025-06-09 | Michael Dybbs | Director | A | +46,000 deriv. | — |
| 2025-06-09 | Paul J Hastings | Chief Executive Officer | A | +377,000 deriv. | — |
| 2025-06-09 | Nadir Mahmood | President | A | +123,500 deriv. | — |
| 2025-06-09 | Rajeev M. Shah | Director | A | +230,000 deriv. | — |
| 2025-01-17 | David Shook | See Remarks | Sell | −8,638 | −$19.00K |
| 2025-01-17 | Paul J Hastings | Chief Executive Officer | Sell | −17,378 | −$38.23K |
| 2025-01-17 | Ralph Brandenberger | Chief Technical Officer | Sell | −7,447 | −$16.38K |
| 2025-01-17 | Alyssa Levin | See Remarks | Sell | −5,838 | −$12.84K |
| 2025-01-17 | Alicia J. Hager | Chief Legal Officer | Sell | −9,584 | −$21.08K |
| 2025-01-07 | David Shook | See Remarks | A | +59,000 | — |
| 2025-01-07 | Ralph Brandenberger | Chief Technical Officer | A | +52,500 | — |
| 2025-01-07 | Alyssa Levin | See Remarks | A | +52,500 | — |
| 2025-01-07 | Paul J Hastings | Chief Executive Officer | A | +94,500 | — |
| 2025-01-07 | Nadir Mahmood | President | A | +62,000 | — |
| 2025-01-07 | Alicia J. Hager | Chief Legal Officer | A | +52,500 | — |
| 2024-08-23 | David Shook | See Remarks | A | −1,352 | −$6.91K |
| 2024-07-31 | Nadir Mahmood | President | A | +550,000 deriv. | — |
| 2024-07-31 | David Shook | See Remarks | A | +23,421 | — |
| 2024-07-18 | Alicia J. Hager | Chief Legal Officer | Sell | −3,396 | −$27.17K |
| 2024-06-20 | Alicia J. Hager | Chief Legal Officer | Sell | −727 | −$4.07K |
| 2024-06-20 | Paul J Hastings | Chief Executive Officer | Sell | −1,770 | −$9.91K |
| 2024-06-20 | James Trager | Chief Scientific Officer | Sell | −456 | −$2.55K |
| 2024-06-20 | David Shook | Chief Medical Officer | Sell | −456 | −$2.55K |
| 2024-06-20 | Ralph Brandenberger | Chief Technical Officer | Sell | −229 | −$1.28K |
| 2024-06-14 | Angela Thedinga | Director | A | +22,500 deriv. | — |
| 2024-06-14 | Zachary Scheiner | Director | A | +22,500 deriv. | — |
| 2024-06-14 | Leone D Patterson | Director | A | +22,500 deriv. | — |
| 2024-06-14 | George Vratsanos | Director | A | +45,000 deriv. | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | Director | 2,271,796 | $4.09M |
| Rajeev M. Shah | Director | 754,311 | $1.36M |
| Simeon George | Director | 666,667 | $1.20M |
| Paul J Hastings | Chief Executive Officer | 390,247 | $702.44K |
| David Shook | See Remarks | 190,955 | $343.72K |
| Nadir Mahmood | President | 167,727 | $301.91K |
| Alicia J. Hager | Chief Legal Officer | 146,735 | $264.12K |
| Ralph Brandenberger | Chief Technical Officer | 124,796 | $224.63K |
| Alyssa Levin | See Remarks | 102,662 | $184.79K |
| Shawn Marshall Rose | See Remarks | 70,000 | $126.00K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the NKTX quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.